Tractor plow



Nov. 22, 1932. I MAHAN 1,888,876

TRACTOR PLOW Filed NOV. 7, 1931 2 Sheets-Sheet 1 A a 8 g V S 8 k8 8 1v Inventor 122072 ,ZZZ/Zdii fi/ flllomey A. MAHAN Nov. 22, 1932.

TRACTOR PLOW 2 Sheets-Sheet 2 Filed NOV. 7. 1931 I r zventor jiazz man q iz-8840152 I llomey Patented Nov. 22, 1932 UNITED STATES ALTON mm, or Burner, enonom TRACTOR FLOW Application Med Kovember 7, 1931. Serial No. 578,655.-

This invention relates to form equipment and machinery end has specific reference to.

on attachment for e conventional motor tractor wherein said attachment is in the nature of a plow and forms a permanent part of the tractor whereby to provide a complete structure which may be unitarily referred to as a tractor plow a I am well aware of the fact that this broad w combination is not new in the prior art to which the invention relates. Therefore, my primary aim is to generally improve u on structures of this classification by provi ing an organization characterized by u careful l5 selection of appropriatel related parts all cooperating in e simplifibd manner to PTO? duce a structurally distinguisheble and novel contribution to the rior art.

In carrying the improved inventive con- 9159 ception into actual practice, l have discovcred a unique essemblage of parts which pro-- vides the requisite result of eficiency and simplified operation, the principel idea be ing in utilizing e structure which. is susceptible of convenient depth regulation and ca public of following the line of movement of the tractor due to the presencein said structure of proper steering connection between the plow and tractor,

In the drewings Figure 1 is a top plan view of a fragmentary portion of a tractor with the; plow hitched thereto.

Figure 2 is a side elevetionel View with $63 portions in section Figure 3 is a, detail sectional end elevational View of the lateral shifting mechanism Figure d is o detail view of the ground 9 wheel hoist.

In Figure 1., the rear axle structure of the tractor is designated by the numeral 5 and the tractor wheels are indicated at 6. There is an especially designed frame 7 attached 45 to the axle structure between the wheels and this frame includes a horizontally disposed portion 8 having integral attaching arms 9 and 10. The two outer arms 9 are secured biy clamps 11 to the rear axle housing while 50 t 0 central short arm is fastened or inchored in place as indicated at 12 in Figure 2, This provides a rigid connection of the frame structure to the axle housing of the tractor. 1

Mounted on the rear bar member 13 of the 55 frame is a yoke 14 having bearin s 15 at its opposite ends slidably and rocka l'y mounted to allow side shifting and raising and lowerin of the plow structure. There is a clev1s at 16 carried by the central portion of 59 the yoke and thisserves to accommodate a T-head 17 forming an integral part of the plow beam 18. i 1

The plow beam is formed with L-shaped brackets 19 carrying the concavo-convex cultivatin'g disks 20.

At the left hand end of the yoke is a hearing 21 which as seen in Figure 3 serves to accommodate a roc'kably mounted crank 22 The vertical arm 23 of the crank has pivotal connection with a, push-pull rod 24 detechably anchored at 25 to one of the end bars of the frame proper The horizontal arm of the crank is pro- 'vided withan upstanding adjusting lever 26 equipped with pawl mechanisms 27 cooperable with the teeth of a segmental rock 28 fixedly mounted on the yoke: Thus by rocking the crank through the medium of the lever 26, the yoke 14 can be shifted trans:

versely of the line of draft or longitudinally back and forth from the bar member 13 of the. frame structure to vary the position of the plow There is a fixture at the rear end of the 85 plow beam which embodies a bracket 30 and an upright 31 having a vertical shaft 32 thereon. Rigidly secured to the upper end of the shaft is an arm 33 secured by a tie rod 34 to an I-bolt 35 secured near the bearing 21 on the yoke. The shaft 32 may be said to form a rocker and the arm 33 constitutes an actuating orrocker arm therefor, and keyed slidably on this shaft 32 is a sleeve 36 carrying a stub axle 37 on which the ground engaging wheel 38 is mounted.

Through the medium of this shaft 32, arm 33 and tie rod 34, thegroundengaging wheel is operated to vary its angle laterally with respect to the longitudinal line of draft of the tractor. Consequently as the yoke it is shifted back and forth on the frame by way of the lever 26, this operating connection 3t serves to automatically adjust the angularity of the ground engaging wheel, causing the plow to follow the line of movement of the tractor.

As seen in Figure 4, the sleeve 36 is provied with spaced studs or pins 39 hetw'een which the end 40 of a hoisting lever 41 is positioned, The hoisting lever is pivoted at plow hours to regulate the depth of cut of the plow discs 20. The gist of the invention is in the provi-= sion of an arm equipped substantially rectangular frame rigidly secured to the rear axle ousing on the tractor, said frame constituting a mounting for the yoke and the yoke heing rockahle and slidahle on the rear frame bar 13 thereof, Novelty is also believed to reside in the specific construction of the yoke provided with a hearing 21 to accommodate its crank 22'which in turn co-operates with the link 24 and lever 26 to hodlly shift the till yoke and associated structure laterally in either direction with respect to the longitudi= 5 null line of draft oi the tractor.

The central pivotal connection of the iorward end of the beam 18 to the adjustahle yoke it adds its proportionate degree oil novelty and etticiency, Moreover, the ground en= gaging wheel and specific mounting contrihutes a further share in the self-adjusting and steeringmeans and further rovides an an rangernent for gauging or etermining the depth of cut of the discs 20. Consequently all of? these specific details form important factors of the organization as a whole to tulfill the requirements oil a structure or this class in a highly satisfactory manner.

a it is thought from the foregoing descriptron that theadvantages and novel features of the invention will be readily apparent. it is to be understood that changes may he made in the construction and in the combinetron and arrangement of the several parts provided that such changes fall within the scope of the appended clalms,

ll claim:

l. in a structure of the class described, in combination, a tractor, a frame structure rigldly secured to the tractor, a yoke rockahly and slidably mounted on said frame strucgfirdfadgustmg and retaining means between e shifting the yoke laterally with respect to the longitudinal line of draft, a diagonally rame structure and yoke for bodily.

aeeaeve disposed. low beam pivotally connected to the contra portion of the yoke, a ground engaging wheel adjustably iulcrumed on a vertical turning axis at the rear end of said beam, and plow discs carried by said beam.

2. In a structure of the class described, in combination, a tractor, a frame structure comprising a frame proper. including a plurality of torwardly extending arms, a substantially ll-shaped yoke having its a terminating in hearings slidably and rock ably mounted on the rear frame her, the hight portion of said yoke being termed with a clevis, and one end of the yoke losing formed with a horizontal bearing, a crank having its horizontal arm mounted for os= cillation in said hearing, a rod connection between the vertical arm and one end bar of the frame, a lever secured to the horizontal arm of the crank and provided with a pawl,

and a rack segment on said yoke with which said pawl is co-operahle, together with a plow including a beam pivotally attached to said clevis.

3. in a structure of the class described, in combination, a tractor, a substantially rec: tangular frame secured to the rear end por tion of the tractor, a yoke slidahly and rock ahly mounted on said frame, adjusting and retaining means for the yoke, a plow includ ing a heam pivotally connected" at its for ward end to the central portion of the yoke,

a wheel mounting including an upright attached to the rear end of said heem, an oscillatory vertical rocker shaft carried by the uprights and provided at itsupper end with a rocker arm, a link connection hetween the rocker arm and one end portion off said yoke,

"a sleeve adjustahle on said shaft and turnable with the shaft provided with a trun= nion, aground engaging wheel mounted on said-trunnion, and plow discs carried by said heam.

d. in a structure of the class descri in combination, a tractor, a suhstantially rectangulan frame secured to the rear end por tion of the tractor, a yoke slidably and rockahly mounted on said tree, adjusting and retaining means for the yoke, a low including a heam pivotally connects at its forward end to the central portion'ot the yoke, a'wheel mounting including an'upright at tached to the rear end of said beam, an cs cillatory vertical rocker shaft carried by the upright and provided at its upper end with a rocker arm, a link connection between the rocker arm and one end portion of said yoke, a sleeve adjustable onsaid shaft and turn;- ahle with the shaft provided with a trunnion, a ground engaging wheel mounted on said trunnion, and plow discs carried by said heam, a segmental rack on therear end por-= tion of the heam, a lever pivotally mounted on said rack and provided with a pawl co-= operable with the teeth of the rack, said llll gal

sleeve being formed with spaced raising and lowering pins, and the adjacent end of said lever being positioned between said pins to permit the sleeve to be raised and lowered on said shaft to adjust the elevation of the wheel with respect to the disc.

In testimony whereof I aflix my signature.

ALTON MAI-IAN. 

